Classifications

• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
  • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
  • G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
  • G03C7/3017—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials with intensification of the image by oxido-reduction
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
  • Y10S430/144—Hydrogen peroxide treatment

Definitions

• This invention relates to an improved method for processing a light-sensitive silver halide photographic material comprising a coupler with a solution containing hydrogen peroxide to obtain an amplified dye image. More particularly, the invention is concerned with an improved method for processing a light-sensitive silver halide photographic material, whereby the dye image amplification becomes possible which shows stable amplification ratio (which will be defined hereinafter) and less formation of fog.
• a light-sensitive silver halide photographic material has long been used widely because of its high photosensitivity and excellent image-forming ability. Recently, however, it becomes serious for many manufacturers of photographic products that the shortage of silver resources have brought a rise of cost of the silver. Therefore, the development of a silver-saving photographic image-forming system has been demanded.
• One of the systems which can meet the above-mentioned demand is a so-called silver-saved type light-sensitive silver halide photographic system, and several techniques concerning such a photographic system have already been known.
• Japanese Patent Publication No. 13576/74 discloses a method using a so-called 2-equivalent type coupler which is prepared by introducing a substituent into the active position of a color coupler in place of hydrogen, with attaining such advantage that the amount of silver required for form one molecule of a dye, which amount has heretofore been four atoms, can be reduced to two atoms.
• the theoretical amount of silver to be used may be reduced to one-half the amount required in the case where the conventional 4-equivalent type coupler is used, and, in practice, it is possible to reduce the amount of silver to less than one-half the amount required in the case of the 4-equivalent type coupler, since the 2-equivalent type coupler is higher in silver efficiency than the 4-equivalent type coupler.
• the upper limit of the amount of silver capable of being reduced is about one-third the amount required at present, and no more reduction in amount of silver can be expected.
• Hydrogen peroxide and cobalt (III) ion complex salts have been known as typycal oxidizing agents for amplifying color images, for example, and it appears that hydrogen peroxide is superior in efficiency. Despite the fact that hydrogen peroxide has been well known as an oxidizing agent hitherto, a method using hydrogen peroxide has not come to be put into practice.
• the term "amplification ratio", referred to herein means, the ratio between the maximum density, assumed as 1, obtained in the case where a photographic material is exposed and then subjected to usual processing, and the maximum density obtained in the case where the same photographic material as above is exposed in the same manner as above and then subjected to amplification processing).
• amplification ratio means, the ratio between the maximum density, assumed as 1, obtained in the case where a photographic material is exposed and then subjected to usual processing, and the maximum density obtained in the case where the same photographic material as above is exposed in the same manner as above and then subjected to amplification processing.
• the processing baths can somewhat withstand the processing when the running period is within one week, but if the running period is made longer, there are brought about such great drawbacks that not only the formation of fog and the degradation in maximum density (D max ) becomes marked, but also the processing time required for the attainment of a definite amplification ratio is greatly extended.
• a still further object of the invention is to provide a method for processing light-sensitive silver halide photographic materials, which method is capable of sufficiently withstanding a long period running in a large scale color laboratory or the like and maintaining constantly high amplification capacity over a long period of time.
• the color developing agent may be incorporated into the light-sensitive silver halide photographic material to be used or included previously in a developing bath. It is also possible to prepare separately a solution containing a color developing agent and incorporate the color developing agent into the light-sensitive silver halide photographic material, for example by means of dipping in or spraying with the solution.
• deactivator As for the deactivator and silver halide solvent used in the present invention for processing, prior to processing with hydrogen peroxide, light-sensitive silver halide photographic materials, it suffices to use at least one of them.
• the term "deactivator” is used herein to mean a substance which reacts with or is adsorbed to active silver or active site, i.e. so-called fog nuclei, which are present in the silver halide at the unexposed portion and form fog upon development, thereby to depress, perfectly or partially, their reactivity with developing agents.
• deactivators preferable for use in the present invention there may be shown, for example, mercapto compounds, azole compounds, oxoniums, halogen ions and dyes. Concrete examples of the deactivators used in the present invention are shown below, but deactivators usable in the present invention are not limited to these.
• All the above-mentioned compounds are those which are adsorbed on silver halides or react with silver to form sparingly soluble silver salts, and can advantageously be used in the present invention.
• a photographic coupler-containing light-sensitive silver halide photographic material is developed and, prior to processing with an amplifying bath containing hydrogen peroxide, is processed with a bath containing the aforesaid deactivator.
• This may contain only the deactivator or may additionally contain other processing chemicals.
• the deactivator is incorporated into a color developer. According to another preferred embodiment of the present invention, the deactivator is used in combination with a black-white developing agent or a color developing agent to form a processing solution.
• the amount of the deactivator used in the present invention varies depending on the kind thereof and the kinds of the processing bath and photographic material used and may be in the range of from 0.1 mg to 20 g/l, although it is in general in the range of from 1 to 500 mg/l, preferably from 3 to 100 mg/l.
• silver halide solvent is used herein to mean a substance which is used, after the development of a light-sensitive silver halide photographic material and before the processing thereof with a hydrogen peroxide-containing solution, to dissolve and remove the silver halide at the unexposed portion.
• silver halide solvents preferable for use in the present invention there may be shown, for example, thiosulfates, thiocyanates, cyanides, amino acid type compounds, thiourea type compounds and thioether type compounds.
• the silver halide solvents used in the present invention are sodium thiosulfate, potassium thiosulfate, ammonium thiosulfate, potassium cyanide, sodium cyanide, sodium thiocyanide, ammonium thiocyanate, thiosinamine, cystine, cysteine, methionine, thiourea, phenylthiourea, 3,6-dithia-1,8-octanediol, 3,12-dioxa-6,9-dithia-1,14-tetradecanediol and 3,6,9-trithiahendecanedioic acid, although the silver halide solvents usable in the present invention are not limited to these.
• the amount of the silver halide solvent used in preparing the processing solution according to the present invention varies depending on the kind thereof and the kinds of the processing bath and photographic material used, but is preferably in the range of from 1 to 20 g/l when it is used in combination with the developing agent, and in the range of from 1 to 200 g/l when it is used alone.
• the pH of the processing solution is preferably in the range of from 6 to 12.
• the processing solution may be incorporated with, in addition to the developing agent, suitable amounts of various additives used in ordinary black-white developers, color developers and fixing solutions, e.g. preservatives, development accelerators, inhibitors, alkali agents, pH regulators, buffer agents and hardeners.
• Typical examples of the treatment steps, to which the processing method of the present invention using a silver halide solvent-containing solution is applicable, are as shown below, but the invention is not limited to these, wherein represents a bath containing a silver halide solvent according to the present invention, and the letter in ( ) shows the presence of black-white developing agent B or color developing agent C.
• "Amplification" represents the processing with a hydrogen peroxide-containing solution according to the present invention.
• Pre-bath in the following treatment steps represents a bath containing a color developing agent, in which bath a light-sensitive silver halide photographic material is dipped to incorporate the color developing agent thereinto.
• typical examples of color developing agents preferable for use in the present invention are p-aminophenol compounds and p-phenylenediamine compounds.
• Specific examples of such compounds include p-aminophenol, diethyl-p-phenylenediamine hydrochloride, monomethyl-p-phenylenediamine hydrochloride, dimethyl-p-phenylenediamine hydrochloride, 2-amino-5-diethylaminotoluene hydrochloride, 2-amino-5-(N-ethyl-N-dodecylamino)-toluene, N-ethyl-N- ⁇ methanesulfonamidoethyl-3-methyl-4-aminoaniline sulfate, N-ethyl-N- ⁇ -methanesulfonamidoethyl-4-aminoaniline, 4-N-ethyl-N- ⁇ -hydroxyethylaminoaniline, 4-a
• color developing agents may be used either singly or in admixture of two or more of them, or they may be used in combination with a black-white developing agent such as hydroquinone.
• the black-white developer or color developer may contain, in addition to these, an alkali agent such as, for example, sodium hydroxide, ammonium hydroxide, sodium carbonate, sodium sulfate, and sodium sulfite, and may contain various additives, e.g. an alkali metal halide such as potassium bromide, and a development regulator such as citrazinc acid.
• the photographic material which has been subjected to color development in the above-mentioned manner, is then processed, either as it is or after simple water-washing (rinsing) or after treatment with a pre-bath containing a color developing agent, with a hydrogen peroxide-containing bath to effect amplification.
• concentration of the hydrogen peroxide-containing solution used in the present invention varies depending on the kind of the photographic material, the kind of the color developing agent, the running speed and other conditions used in the specific processing, although it is in general in the range of from 0.1 to 40%, preferably from 0.3 to 12%.
• the amplification processing with a hydrogen-containing solution according to the present invention is carried out by means of spraying and/or intermittent dipping.
• the amplification by use of hydrogen peroxide shows less fog formation and more stable amplification ratio when effected, as in the present invention, by means of spraying and/or intermittent dipping than when effected by means of continuous dipping of photographic materials.
• the adoption of the spraying method and ordinary dipping method in processing with a hydrogen peroxide containing solution, as in the present invention has the following advantages.
• concentration of the developing agent in the bath containing hydrogen peroxide increases gradually due to carry-over and diffusion.
• Such an amplifying bath enriched with developing agents would cause increase in amplification ratio of the resultant color images and in color fog formation, and, in extreme cases, color staining. Occurrence of these troubles makes the quality of color images markedly changeable, with the result that yield becomes lower in a color laboratory or the like and cost becomes higher.
• the amount of the hydrogen peroxide used in a practical running can be reduced to less than one-fifth that used in the method wherein hydrogen peroxide is supplemented.
• the method of the invention has the advantages of easy maintenance and low cost because the concentration of the developing agent is unchangeable and constant high yield can be ensured.
• photographic materials are contacted with a hydrogen peroxide-containing solution for a certain period of time, and after a certain period of time following that, they are brought into contact therewith.
• they are kept in contact with a hydrogen peroxide-containing solution for a period of from 20 to 50 seconds at intervals of from 30 to 10 seconds.
• a hydrogen peroxide-containing bath the ordinary dipping method
• the spray method the spray method.
• a photographic material to which the method of the invention is applied may be subjected to, in addition to the above-mentioned treatments, pre-hardening treatment and to pre-bath treatment for better impregnation with the color developing agent, and, in the case of reversal development, it may be subjected to black-white development, bleaching, etc.
• a treatment using a fixing solution either alone or in combination with a bleaching solution, or using a bleach-fixing solution, in general. This treatment is carried out in combination with other various treatments such as, for example, water-washing, stopping and stabilization treatment.
• the fixing component there is used a silver halide solvent such as sodium thiosulfate or ammonium thiosulfate, while as the bleaching component, there is used potassium ferricyanide, ferric ammonium ethylenediaminetetraacetate or its sodium salt.
• a silver halide solvent such as sodium thiosulfate or ammonium thiosulfate
• potassium ferricyanide ferric ammonium ethylenediaminetetraacetate or its sodium salt.
• the method of the present invention is usable for the processing of a coupler-containing light-sensitive silver halide photographic material, and is advantageously applied particularly to a so-called silver-reduced light-sensitive silver halide photographic material containing a silver halide and a photographic coupler in an amount stoichiometrically larger than the available silver of said silver halide.
• the amount of silver used can be reduced to less than one-fourth the amount of silver required in the prior art.
• the silver halide used in this case are silver chloride, silver bromide, silver iodide, and mixed silver halides such as silver chlorobromide, silver iodobromide and silver iodochlorobromide.
• Emulsions of these silver halides may be prepared by any known process.
• the silver halide emulsion used in the present invention may be any of so-called conversion emulsion, Lipmann emulsion or covered grain emulsion which may have previously been fogged either optically or chemically, and is suitably selected according to the kind and usage of the resulting photographic material.
• the kind, halogen content and proportion, average particle size and size distribution of the silver halide emulsion are also selected suitably according to the kind and usage of the resulting photographic material.
• an emulsion composed mainly of silver halide which is fine in particle size and narrow in size distribution is used for preparation of a photographic material required to be relatively low in speed and high in image quality, while an emulsion relatively large in particle size and less in silver chloride content is used for preparation of a photographic material required to be relatively high in speed.
• an emulsion which has previously been fogged is used for preparation of a direct positive type photographic material.
• These silver halide emulsions may be chemically sensitized by use of active gelatin; sulfur sensitizers, e.g. allylthiocarbamide, thiourea and cystine; selenium sensitizers; reduction sensitizers, e.g.
• noble metal sensitizers e.g. gold sensitizers such as potassium aurithiocyanate, potassium chloroaurate and 2-aurosulfobenzothiazole methochloride, or sensitizers composed of water-soluble salts of ruthenium, rhodium and iridium, such as ammonium chloropalladate, potassium chloroplatinate and sodium chloropalladite (some of these act as sensitizers or antifoggants depending on their amounts), either alone or in proper combination (e.g. combination of gold sensitizer with sulfur sensitizer, or combination of gold sensitizer with selenium sensitizer).
• gold sensitizers such as potassium aurithiocyanate, potassium chloroaurate and 2-aurosulfobenzothiazole methochloride
• silver halide emulsions may be optically sensitized to desired wavelength regions by use of optical sensitizers, e.g. cyanine or merocyanine dyes such as zeromethine, monomethine, dimethine or trimethine dyes.
• optical sensitizers e.g. cyanine or merocyanine dyes such as zeromethine, monomethine, dimethine or trimethine dyes.
• These sensitizers may also be used either alone or in combination (for example for the purpose of supersensitization).
• the silver halide is dispersed in a suitable protective colloid to constitute a photosensitive layer.
• protective colloids for constituting the photosensitive layer and other layers such as, for example, inter layer, protective layer and filter layer, gelatin is used in general.
• gelatin derivatives, colloidal albumins, cellulose derivatives or synthetic resins such as polyvinyl compounds, e.g polyvinyl alcohols. These are used either alone or in combination with each other.
• acetylcellulose having an acetyl content of about 19 to 26% or water-soluble ethanolamine cellulose acetate may be used in combination therewith.
• the light-sensitive silver halide photographic materials used in the present invention contain couplers for forming color images.
• couplers for forming color images.
• Example of useful couplers are open-chain methylene type yellow couplers, 5-pyrazolone type magenta couplers, and phenol or naphthol type cyan couplers. These couplers may be any of so-called 2-equivalent type or 4-equivalent type couplers, and may be used in combination with azo type colored couplers, osazone type compounds or development diffusible dye-yielding type couplers for automasking. In this case, it is desirable to use the above-mentioned masking couplers in combination with so-called colorless couplers which are colorless before color development.
• the photographic materials may be incorporated with so-called competing couplers, DIR (Development Inhibitor Releasing) couplers and BAR (Bleach Accelerator Releasing) couplers in combination with other couplers.
• DIR Development Inhibitor Releasing
• BAR Block Accelerator Releasing
• yellow couplers there have heretofore been used open-chain ketomethylene compounds.
• effective as pivalyl acetanilide type yellow couplers are the compounds disclosed in French Pat. No. 1,291,110
• effective as benzoyl acetanilide type yellow couplers are the compounds disclosed in Japanese Patent Publication No. 19031/71 and U.S. Pat. No. 2,875,051.
• the active position-O-allyl-substituted couplers as disclosed in U.S. Pat. No. 3,408,194 the active position-O-acyl-substituted couplers as disclosed in U.S. Pat. No.
• magenta couplers used in the present invention include pyrazolone type, pyrazolotriazole type, pyrazolinobenzimidazole type, and indazolone type compounds.
• pyrazolone type magenta couplers are those disclosed in U.S. Pat. Nos. 3,127,269, 2,600,788, 3,519,429, 3,419,391 and 3,062,653, British Pat. No. 1,342,553, West German Pat. No. 2,162,778, Japanese Patent Laying-Open-to-Public No. 29639/74 and Japanese Patent Application No. 8433/69; preferable as the pyrazolotriazole type magenta couplers are those disclosed in West German Pat. No.
• Useful cyan couplers usable in the present invention are the phenol compounds disclosed in, for example, U.S. Pat. Nos. 2,423,730, 2,801,171 and 2,895,826 and Belgian Pat. No. 779,512; the active position-O-aryl-substituted naphthol compounds disclosed in U.S. Pat. No. 2,474,293 and British Pat. No. 1,084,480; and the phenol and naphthol compounds disclosed in Japanese Patent Laying-Open-to-Public No. 37425/72 and Japanese Patent Application Nos. 57829/68, 69866/68, 10787/74, 16057/74, 25388/74 and 37160/74.
• colorless magenta couplers having active positions substituted by arylazo or heteroarylazo compounds which are disclosed in, for example, U.S. Pat. Nos. 3,005,712, 2,983,608 and 2,801,171, British Pat. No. 937,621 and Japanese Patent Application No. 8433/69.
• colored cyan couplers there may be used the active position-arylazo-substituted couplers disclosed in, for example, U.S. Pat. Nos. 3,034,892 and 2,521,908, British Patent 1,255,111 and Japanese Patent Application No. 55665/71, and masking couplers of such type the dyes flow into the processing baths by reaction with the oxidation products of developing agents which are disclosed in, for example, Japanese Patent Application 57829/73, Japanese Patent Application No. 69866/73, Japanese Patent Application No. 16057/74, Japanese Patent Application No. 25388/74, Japanese Patent Application No. 37160/74 and British Patent 1,084,480.
• a silver halide emulsion containing a photographic coupler which has been prepared in the above manner, is applied to the form of a layer onto a support, if necessary together with sub layer, inter layer, filter layer, anticurling layer, protective layer, etc., whereby the light-sensitive silver halide photographic material used in the present invention is obtained.
• the support usable in this case are paper, laminated papers (e.g. a laminate of polyethylene and paper), glass plates, and films, or sheets of such substrates as cellulose acetate, cellulose nitrate, polyesters, polycarbonates, polyamides, polystyrenes and polyolefins.
• the said supports may be subjected to various surface treatments such as, for example, saponification, corona discharge, subbing, setting, etc.
• a photographic material is composed at least of a support and a photosensitive layer provided thereon. As mentioned previously, however, it may have further proper layers at various positions for different purposes, and is composed of more than two layers, in general. Further, the photosensitive layer itself may be composed of a laminate of, for example, a layer containing a relatively high speed silver halide and a layer containing a relatively low speed silver halide which have been color-sensitized to same or different wavelength regions.
• the photographic material used in the present invention may contain, for different purposes, various photographic additives in the photosensitive layer and/or other layers, e.g. inter layer, sub layer, filter layer, protective layer and image-receiving layer.
• photographic additives are stabilizers, e.g. mercury compounds, triazoles, azaindenes, and quaternary benzothiazolium, zinc or cadmium salts; sensitizers such as quaternary ammonium salts or polyethylene glycols; film-property improvers, e.g.
• glycerin dihydroxyalkanes such as 1,5-pentanediol, esters of ethylenebisglycolic acid, bisethoxydiethylene glycol succinates, amides of acrylic type acids, and polymer emulsions or dispersions; hardeners, e.g.
• halogen-substituted fatty acids such as mucochloric and mucobromic acids, compounds having acid anhydride groups, dicarboxylic acid chlorides, disulfonic acid chlorides, biesters of methanesulfonic acid, sodium bisulfite derivatives of dialdehydes whose aldehyde groups have been separated by 2 to 3 carbon atoms, bisaziridine, and ethyleneimines; vehicles, e.g. saponin, lauryl or oleyl monoethers of polyethylene glycols, and sulfated and alkylated polyethylene glycol salts; coating aids, e.g.
• organic solvents e.g. coupler solvents (high and/or low boiling organic solvents such as dibutyl phthalate, tricresyl phosphate, acetone, methanol, ethanol and ethylene cellosolve); so-called DIR compounds which, at the time of color development, yield development inhibitors and, at the same time, form substantially colorless compounds; and such additives as antistatic agents, defoaming agents, ultraviolet absorbers, fluorescent brightening agents, anti-slip agents, matting agents, and anti-halation or anti-irradiation agents. These additives may be used either singly or in combination of two or more members.
• coupler solvents high and/or low boiling organic solvents such as dibutyl phthalate, tricresyl phosphate, acetone, methanol, ethanol and ethylene cellosolve
• additives as antistatic agents, defoaming agents, ultraviolet absorbers, fluorescent brightening agents, anti-slip agents, matting agents, and anti-halation or
• the light-sensitive silver halide photographic material used in the present invention can successfully be put into various uses, and are used as, for example, general negative photographic materials, general reversal photographic materials, general positive photographic materials, direct positive type photographic materials and photographic materials for specific uses (e.g. for printing, X-rays, high resolution, infrared, ultraviolet, etc.).
• a solution of a couplder 1-(2,4,6-trichlorophenyl)-3-[3-(2,4-di-tert-pentylphenoxy-acetamido)benzamide]-5-pyrazolone in dibutyl phthalate was protect-dispersed in aqueous gelatin solution to form a coupler dispersion.
• This dispersion was mixed with a silver chlorobromide emulsion, and the resulting mixture was coated on a resin-coated paper support, which had previously been subjected to corona discharge pre-treatment, and then dried to prepare a sample.
• the coated amounts of the silver and coupler per 100 cm 2 were 0.40 mg and 3.2 mg, respectively.
• the aforesaid developed sample was processed at 30° C. for 1 minute with a deactivation bath of the composition shown below to deactivate the silver halide at the unexposed portion and, at the same time, to adsorb a paramine type compound thereon.
• the sample was sprayed at room temperature with an amplifying solution of the composition shown below to apply thereto 10 ml of the solution per 100 cm 2 , and then subjected to the same desilver-fixing and stabilization treatments as in the case of usual color photographic materials to form a magenta image.
• the D min and D max of the thus obtained magenta image were 0.02 and 2.60, respectively.
• the amount of hydrogen peroxide required for amplification can be reduced ultimately by the spray method, when compared with the one used by the continuous dipping method at the same hydrogen peroxide concentration, and unchanged amplification performance can be maintained from beginning to end of the processing in the case of the spray method.
• a solution of a coupler 2-(1-benzyl-2,4-dioxoimidazolidine-3-yl)-2-pivalyl-2'-chloro-5'-[4-(2,4-di-tert-pentylphenoxy)butanamide]acetanilide in dibutyl phthalate was protect-dispersed in aqueous gelatin to form a coupler dispersion.
• This dispersion was mixed with a silver chlorobromide emulsion, and the resulting mixture was coated on a resin-coated paper support.
• the coated amounts of the silver and coupler per 100 cm 2 were 1.00 mg and 8.23 mg, respectively.
• a gelatin inter layer containing dioctylhydroquinone On this layer was then formed a gelatin inter layer containing dioctylhydroquinone. On this inter layer was further formed a layer composed of a mixture comprising a green-sensitive silver chlorobromide emulsion and a coupler dispersion prepared by protect-dispersing in an aqueous gelatin solution a solution in dibutyl phthalate of a coupler 3- ⁇ 2-chloro-5-[1-(octadecyl)succinimido]anilino]-1-(2,4,6-trichlorophenyl)-5-pyrazolone.
• the amounts of the coupler and silver used in said layer were 4.3 mg and 0.55 mg, respectively, per 100 cm 2 .
• the said layer was further coated with a gelatin solution of dioctyl hydroquinone to form a color turbidity-preventing layer.
• a layer composed of a mixture comprising a red-sensitive silver chlorobromide emulsion and a coupler dispersion prepared by protect-dispersing in an aqueous gelatin solution a solution in dibutyl phthalate of a coupler 2-[2-(2,4-di-tert-pentylphenoxy)butanamido]-4,6-dichloro-5-methylphenol.
• the coated amounts of the coupler and silver used in said layer were 2.9 mg and 0.85 mg, respectively, per 100 cm 2 .
• This layer was further coated with a gelatin protective layer and then with an ultraviolet-absorbing layer containing an ultraviolet absorber to form a color paper photographic material.
• the thus obtained sample was print-exposed through a color negative film and then subjected to the following processing steps.
• Method 1 The sample is dipped in the amplifying solution for consecutive four minutes.
• Method 2 The sample was dipped in the amplifying solution for 15 seconds and then kept outside the solution for 15 seconds, after which it was dipped in the solution for 5 seconds and then kept outside the solution for 25 seconds and these two treatments are repeated two more times.
• Method 3 The sample is sprayed with the amplifying solution to apply thereto 2.5 ml of the solution per 100 cm 2 , and 30 seconds after that, the 2.5 ml spraying is repeated two times.
• the amplifying solution when applied by Method 2 or 3 according to the invention, exhibits not only excellent stability in performance, but also a high color forming speed.
• the resulting dispersion was mixed with a high speed red-sensitive silver iodobromide emulsion (Ag 2.5 mg/100 cm 2 ).
• the resulting mixture was then coated on one side of a clear cellulose triacetate film base which had been subjected to subbing treatment with an alkali.
• emulsion layer On the thus formed emulsion layer was formed a layer composed of a gelatin solution of 2,5-dioctylhydroquinone, and on the resulting layer was further formed in the same way as in the case of the lower-most layer, an ortho layer composed of a mixture comprising a panchromatically sensitized silver iodobromide emulsion (Ag 1.84 mg/100 cm 2 ) and a dispersion prepared by protect-dispersing in an aqueous gelatin solution a solution formed by dissolving in dibutyl phthalate an equivalent amount of 1-(2,4,6-trichlorophenyl)-3-[3-(2,4-di-tert-pentylphenoxyacetamido)benzamido]-5-pyrazolone (10.2 mg/100 cm 2 ) and 1-(2,4,6-trichlorophenyl)-3-[3-(2,4-di-tert-pentylphenoxyacetamido
• the coated amounts of the yellow coupler, cyan coupler and silver per 100 cm 2 were 5.55 mg, 4.5 mg and 2.75 mg, respectively.
• the thus obtained color X-ray photographic material was exposed through a fluorescent intensifying screen and an aluminum wedge to X-rays from a tube energized at 60 KV p and 200 mA for 0.5 second, and the subjected to the same development and amplification treatments as in Example 2 to compare the three kinds of methods of amplification.
• the results obtained were substantially the same as those obtained in Example 2.
• a polyester film base was coated with a mixture comprising a high speed silver iodobromide emulsion and a dispersion prepared by protect-dispersing, in the conventional manner using a dispersion aid Alkanol B (manufactured by Du Pont Nemours E.
• the thus obtained photographic material was exposed through a fluorescent intensifying screen and an aluminum wedge to X-rays from a tube energized at 60 KV p and 200 mA for 0.5 second.
• the exposed photographic material was then subjected, at 30° C., to the following processing steps:
• the amplification step also was effected, as in Example 2, by Method 1 (simple dipping method), Method 2 (intermittent dipping method) and Method 3 (spray method) to compare these methods with each other.
• Method 1 simple dipping method
• Method 2 intermittent dipping method
• Method 3 spray method
• a solution of a coupler 2-(1-benzyl-2,4-dioxoimidazolidine-3-yl)-2-pivalyl-2'-chloro-5'-[4-(2,4-di-tert-pentylphenoxy)butanamido]acetanilide in dibutyl phthalate was protect-dispersed in an aqueous gelatin solution to form a coupler dispersion.
• This dispersion was mixed with a silver chlorobromide emulsion, and the resulting mixture was coated on a resin-coated paper support.
• the coated amounts of the silver and coupler per 100 cm 2 were 0.87 mg and 8.23 mg, respectively.
• a gelatin inter layer containing dioctylhydroquinone On this layer was then formed a gelatin inter layer containing dioctylhydroquinone. On this inter layer was further formed a layer composed of a mixture comprising a green-sensitive silver chlorobromide and a coupler dispersion prepared by protect-dispersing in an aqueous gelatin solution a solution of a coupler 1-(2,4,6-trichlorophenyl)-3-[3-(2,4-di-tert-pentylphenoxyacetamido)benzamido]-5-pyrazolone in dibutyl phthalate. The amounts of the coupler and silver used in said layer were 4.7 mg and 0.97 mg, respectively, per 100 cm 2 .
• the said layer was further coated with a gelatin solution of dioctylhydroquinone to form an anti color stain layer.
• a layer composed of a mixture comprising a red-sensitive silver chlorobromide emulsion and a coupler dispersion prepared by protect-dispersing in an aqueous gelatin solution a solution of a coupler 1-hydroxy-N-[4-(2,4-di-tert-pentylphenoxy)butyl]-2-naphthamide in dibutyl phthalate.
• the coated amounts of the coupler and silver used in said layer were 3.2 mg and 0.73 mg, respectively, per 100 cm 2 .
• the thus processed samples were further processed at 30° C for 1 minute with a processing bath of the following composition to adsorb a paramine type compound thereon.
• the samples were sprayed at 30° C with an amplifying solution to apply thereto 10 ml of the solution per 100 cm 2 , and then subjected to the same desilver-fixing and stabilization treatments as in the case of usual color photographic materials to form color images (Method 1).
• Method 2 Similar samples were dipped for consecutive four minutes in the amplifying solution.
• Method 3 Similar samples were processed in the same manner as in the case of Method 2, except in that the bath containing a silver halide solvent according to the invention was not used.

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• 1975
  • 1975-10-24 JP JP50127936A patent/JPS5251941A/ja active Granted
• 1976
  • 1976-10-20 US US05/734,271 patent/US4094682A/en not_active Expired - Lifetime
  • 1976-10-22 DE DE19762647930 patent/DE2647930A1/de not_active Withdrawn

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